<?php

class upload{

    public function __construct(){
        $typeArr = array("jpg", "png", "gif");//允许上传文件格式
        $path = "uploads/newsinfo/img/";//上传路径

        if (isset($_POST)) {
            $name = $_FILES['file']['name'];
            $size = $_FILES['file']['size'];
            $name_tmp = $_FILES['file']['tmp_name'];
            if (empty($name)) {
                echo json_encode(array("error"=>"您还未选择图片"));
                exit;
            }
            $type = strtolower(substr(strrchr($name, '.'), 1)); //获取文件类型
            
            if (!in_array($type, $typeArr)) {
                echo json_encode(array("error"=>"清上传jpg,png或gif类型的图片！"));
                exit;
            }
            if ($size > (500 * 1024)) {
                echo json_encode(array("error"=>"图片大小已超过500KB！"));
                exit;
            }
            
            $pic_name = time() . rand(10000, 99999) . "." . $type;//图片名称
            $pic_url = $path . $pic_name;//上传后图片路径+名称

            if (move_uploaded_file($name_tmp, $pic_url)) { //临时文件转移到目标文件夹
                echo json_encode(array("error"=>"0","pic"=>"/".$pic_url,"name"=>$pic_name));
            } else {
                echo json_encode(array("error"=>"上传有误，清检查服务器配置！"));
            }
        }
    }
  
}


    $uu = new upload;

?>